OK, so we didn't know about all the bas shit from using these chemicals in our plastic revolution. I guess we had to learn the hard way with negative consequences. But now we do know. So, why are many of these chemicals still being used? Profit and convenience.

Given all the the different ways they assault us, agendas regarding depopulation etc I am not so sure it was not known by those controlling the introduction and usage of these products. It suggests as much as well in the question you asked about why are they still being used. I read recently the plastics have ruined our water supply and they have no effective means to clean it from the water they pipe into our houses.